Magnetic-field-induced metallic state in β-US2

Kiyohiro Sugiyama, Yusuke Hirose, Kentaro Enoki, Shugo Ikeda, Etsuji Yamamoto, Naoyuki Tateiwa, Yoshinori Haga, Takanori Kida, Masayuki Hagiwara, Koichi Kindo, Fuminori Honda, Rikio Settai, Yoshichika Onuki

研究成果: ジャーナルへの寄稿学術誌査読

3 被引用数 (Scopus)


β-US2 with the orthorhombic structure is an interesting compound of which the electrical property is changed from a metallic state to an insulating state at temperatures lower than 80 K. To clarify the present metal-insulator change, we carried out the magnetization and magnetoresistance measurements in magnetic fields up to 50 T. The magentization at 4.2 K saturates above 40 T, reaching 1.75 μB/U at 50 T for the magnetic field along the magentic easy-axis, namely the [001] direction. The corresponding electrical resistivity at 4.2 K is steeply reduced in magnitude from 1 × 103 Ω·cm to 2 × 10-2 Ω·cm at 50 T only when the magnetic field is applied along the [001] direction. The temperature dependence of the electrical resistivity at 50 T indicates a usual metallic behaviour. The conduction electrons are most likely released from the trapped U-sites when the 5f-CEF magnetic moments are fully polarized in high magnetic field of 50 T. The present experimental results are discussed from the viewpoint of the magnetic polaron.

ジャーナルjournal of the physical society of japan
出版ステータス出版済み - 7月 2011

!!!All Science Journal Classification (ASJC) codes

  • 物理学および天文学(全般)


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